<template>
	<view>
		<!-- 使用自定义的搜索组件 -->
		<!-- 自定义属性绑定 -->
		<!-- <my-search :bgcolor="'pink'" :radius="3"></my-search> -->
		<my-search @click="gotoSeach"></my-search>

		<view class="scroll-view-container">
			<!-- 左侧的滑动区域 -->
			<scroll-view class="left-scroll-view" scroll-y="true" :style="{height: wh+'px'}">
				<block v-for='(item,i) in cateList' :key='i'>
					<view :class="['left-scroll-view-item',i===active?'active':'']" @click="activeChange(i)">
						{{item.cat_name}}
					</view>
				</block>
			</scroll-view>

			<!-- 右侧的滑动区域 -->
			<scroll-view scroll-y="true" :style="{height: wh+'px'}" :scroll-top="scrollTop">
				<view class="cate-lv2" v-for="(item2,i2) in cateLevel2" :key="i2">
					<!-- 二级分类的标题 -->
					<view class="cate-lv2-title">/ {{item2.cat_name}} /</view>

					<!-- 当前二级分类下的三级分类列表 -->
					<view class="cate-lv3-list">
						<!-- 三级分类的item项 -->
						<view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key="i3"
							@click="gotoGoodsList(item3)">
							<!-- 三级分类的图片 -->
							<!-- <image :src="item3.cat_icon"></image> -->
							<!-- <image :src="item3.cat_icon"></image> -->
							<image src="../../static/c6.png" mode=""></image>
							<!-- 三级分类的文本 -->
							<text>{{item3.cat_name}}</text>
						</view>
					</view>
				</view>
			</scroll-view>
		</view>

	</view>
</template>

<script>
	export default {
		data() {
			return {
				// 当前设备可用的高度
				wh: 0,
				// 分类数据列表
				cateList: [],
				active: 0,
				// 二级分类列表
				cateLevel2: [],
				scrollTop: 0
			};
		},

		onLoad() {
			const sysInfo = uni.getSystemInfoSync()
			console.log("获取手机信息");
			console.log(sysInfo);
			this.wh = sysInfo.windowHeight - 50

			this.getCateList()
		},

		methods: {
			async getCateList() {
				const {
					data: res
				} = await uni.$http.get('./api/public/v1/categories')
				// 判断是否获取失败
				if (res.meta.status !== 200) return uni.$showMsg()
				this.cateList = res.message

				// 为二级分类赋值
				this.cateLevel2 = res.message[0].children
			},
			activeChange(i) {
				this.active = i

				// 重新为二级分类赋值
				this.cateLevel2 = this.cateList[i].children

				this.scrollTop = this.scrollTop == 0 ? 1 : 0
			},
			//跳转到商品列表页面
			gotoGoodsList(item) {
				uni.navigateTo({
					url: '/subpkg/goods_list/goods_list?cid=' + item.cat_id
				})
			},
			gotoSeach(){
				uni.navigateTo({
					url:'/subpkg/search/search'
				})
			}
		}
	}
</script>

<style lang="scss">
	.scroll-view-container {
		display: flex;

		.left-scroll-view {
			width: 120px;
		}

		.left-scroll-view-item {
			background-color: #f7f7f7;
			line-height: 60px;
			text-align: center;
			font-size: 12px;

			&.active {
				background-color: #fff;
				position: relative;

				&::before {
					content: "";
					display: block;
					width: 3px;
					height: 30px;
					background-color: #c00000;
					position: absolute;
					top: 50%;
					left: 0;
					transform: translateY(-50%);
				}
			}
		}
	}

	.cate-lv2-title {
		font-size: 12px;
		font-weight: bold;
		text-align: center;
		padding: 15px 0;
	}

	.cate-lv3-list {
		display: flex;
		flex-wrap: wrap;

		.cate-lv3-item {
			width: 33%;
			display: flex;
			flex-direction: column;
			// 水平居中
			align-items: center;
			// 垂直居中
			justify-content: center;
			margin-bottom: 10px;

			image {
				width: 60px;
				height: 60px;
			}

			text {
				font-size: 12px;
			}
		}
	}
</style>